If you have a skin growth that looks like a wart, you may have developed seborrheic keratosis. It’s a worrisome name, but take a deep breath — these lesions, sometimes called “the barnacles of aging,” are not dangerous. In fact, they are one of the most common skin conditions you can get as you age. Researchers estimate that more than 90% of adults over...

Psoriasis is a chronic inflammatory disorder that results in plaque formation on the surface of the skin. The exact cause of this disorder is unknown, but it’s likely the result of problems with the body’s autoimmune system. Psoriasis typically affects the skin on the scalp, joints, hands, and lower body, including the knees, elbows, lower back, feet and genitals. Adults and children can be...